4 minutes ago, noxdeouroboros said:
Do you even consider using google first
this isn't something you can really turn off and it's been a thing in windows for a g e s. it's like a pagefile - it will not be used unless it really needs to be, but if it isn't there then there is nowhere for data to go if the VRAM is full and shit hits the fan. your GPU will not start eating through your system memory. games detect it as 4GB and that's what games will use.